Method of manufacture of tubular bodies, such as pipes, hollow masts, or the like.



METHOD OF MANUFACTURE OF TUBULAR BODIBS,SUGH AS PIPES, HOLLOW MASTS; OR THE LIKE.

' APPLICATION FILED NOV. 5, 1910.

W messes Patented Ma 28, 1912.

" UNITED STATES PATENT orrion.

HANS SIEGWART, OF LUCERNE, SWITZERLAND.

METHOD OF MANUFACTURE OF TUBULAR BODIES, SUCH AS )PIPES, HOLLOW MASTS, OR THE LIKE.

' Specification of Letters Patent.

To all whom it may concern:

Be it known that I, HANS SIEGWART, residing at Lucerne, Switzerland, have invented certain new and useful Improvements in Methods of Manufacture of Tubular Bodies, Such as Pipes, Hollow Masts, or the Like, of which the following is a specification.

This invention is for improvements in or relating to a method of manufacture of tuhular bodies such as pipes, hollow masts or the like from lengths or fillets of artificial stone or similar material.

According to this invention the lengths or fillets of artificial stone are built upon a core and secured together by some adhesive material such as cement that can be introduced between the fillets while soft and afterward hardens and holds the parts together. The fillets with the cementing medium are held in place upon the core by a binding or wrapping sheet of sacking or.

other suitable material.

v The method of manufacture consists in mounting the fillets upon the sacking or other binding, the fillets being arranged longitudinally upon the binding and spaced apart a convenient distance. The cementing medium is then applied between the fillets and the band or binding of seeking and thus loaded (conveniently while in a flat state) is wrapped around the core and holds all the parts in place until the cementing medium has set.

In the accompanying drawings, which illustrate by way of example one method of carrying out this invention, Figure 1 shows a cylindrical tube in transverse section, Fig. 2 shows two of the fillets on the binding material, and Fig. 3 shows the arrangementof the fillets on the binding material.

Like letters indicate like parts throughout the drawings.

The fillets 1 which may be of any convenient length are laid in rows upon a flexible wrapping sheet or band of binding material 2, the width of which is equal to the circumference of the tubular body to be formed. The fillets are spaced apart a convenient distance as shown and form a layer in which those in one row break joints with those in the next. Longitudinal reinforcing rods, say of iron, 3 are dropped in be' tween the rows and then a suitable binder such as cement which can be applied soft and will afterward harden is introduced between the fillets. During these operations, the flexible sheet or band 2 is conveniently retained in a fiat state (Figs. 2 and '3), but

when loaded, as described, it is wrapped around the core and thus all the parts are brought into the position shown in Fig. 1. When the cementing medium'has set the tubular body thus formed can be removed from the core and a lining at of cement or asphalt may be applied to the interior. T he exterior may be similarly coated if desired,

'either after or before removal from the core. In some cases it. is preferred to apply a winding of reintorcing wire 5 to the exterior lot the tubular body before it is removed from the core and then to cover this with a coating of cement, asphalt or other material; 6.

What I "claim as my invention and desire to secure by Letters Patent is 1 1. The method of making tubular bodies consisting in arranging fillets upon a flexible wrapping sheet, introducing between the fillets a soft adhesive which will harden, and wrapping the flexible sheet thus loaded around a core.

Patented May 28, 1912.

. 2. The method of making tubular bodies consisting in arranging fillets upon a flexible wrapping sheet, placing reinforcing rods longitudinally between the fillets, introducing between the fillets a soft adhesive which will harden, and wrapping the flexible sheet thus loaded around a core with the rods extending longitudinally thereof.

3. The method of making tubular bodies consisting in arranging a layer of fillets upon a flexible wrapping sheet and disposed thereupon end to end in parallel rows extending longitudinally of'the tubular body to be made, with the fillets in any one row breaking joints with. those in the next adjacent rows, introducing between the fillets a soft adhesive which will harden, and wrapping the flexible sheet thus loaded around a core.

t. The method of making tubular bodies consisting inarranging a layer of fillets upon a flexible wrapping sheet and disposed thereupon end to end in parallel rows ertending longitudinally of the tubular body to be made, with the fillets in any one row breaking joints'with those in the next adjacent rows, placing reinforcing rods longitudinally between the rows of fillets introducing between the fillets a soft adhesive which will harden, and wrapping the flexible sheet thus loaded around a core with the rods extending longitudinally thereof,

5. The method of.-'-1'haking tubular bodies consisting in arranging fillets upon a flexible wrapping sheet, introducing between the fillets a soft adhesive which will harden, wrapping the flexible sheet thus loaded around a core, and placinga winding of re- Winding with a layer of soft material which will harden after application. 3

7. The method of making tubular bodies consisting in arranging fillets upon a flexible wrapping sheet, introducing between the fillets a soft adhesive which will harden,

Wrapping the flexible sheet thus loaded around a core, placing a winding of reinforcing Wire around the Whole, covering the winding with a layer of soft material which will harden after application, and introducing'at some stage of the procedure longitudinally disposed reinforcing rods.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' HANS SIEGNART. Witnesses:

PAUL FELMDER, ,C'. FINoH. 

